Which of the following factors control the design of a fluid-solid reactor? All of these Flow patterns of solids and fluid in the reactor Size distribution of solids beingtreated Reaction kinetics for single particle, TRUE ANSWER : ? YOUR ANSWER : ?
In an ideal mixed reactor (at steady state), the Space time is equivalent to holding time for constant density systems All of these Exit stream has the same composition as the fluid within the reactor Composition throughout the reactor remains same TRUE ANSWER : ? YOUR ANSWER : ?
The rate expression for a heterogenous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + Kr.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A) E E + ΔHA ΔHA + ΔHR E + ΔHA - ΔHR TRUE ANSWER : ? YOUR ANSWER : ?
The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor. Unpredictable from the data Smaller than Equal to Greater than TRUE ANSWER : ? YOUR ANSWER : ?
Holding time for flow reactors is __________ the space time, for constant fluid density Equal to Triple None of these Double TRUE ANSWER : ? YOUR ANSWER : ?
A stirred tank reactor compared to tubular-flow reactor provides Higher overall selectivity for a first order consecutive reaction More uniform operating conditions Permits operation at the optimum temperature for a long reaction time All of these TRUE ANSWER : ? YOUR ANSWER : ?
For an ideal gas mixture undergoing a reversible gaseous phase chemical reaction, the equilibrium constant Increases /decreases with pressure depending on the stoichiometric co-efficients of the reaction Increases with pressure Is independent of pressure Decreases with pressure TRUE ANSWER : ? YOUR ANSWER : ?
An autothermal reactor is Completely self-supporting in its thermal energy requirements Isothermal in nature Most suitable for a second order reaction Most suitable for a reversible reaction TRUE ANSWER : ? YOUR ANSWER : ?
Space velocity All of these Is a measure of the ease of the reaction Describes the extensive operating characteristics of a tubular flow reactor Is the maximum feed rate pre unit volume of reactor for a given conversion TRUE ANSWER : ? YOUR ANSWER : ?
In case of staged packed bed reactors carrying out exothermic reaction, use High recycle for pure gas Plug flow for dilute liquid requiring no large preheating of feed All of these Cold shot operations for a dilute solution requiring large preheating to bring the stream upto the reaction temperature TRUE ANSWER : ? YOUR ANSWER : ?